@alexpott has contributed significantly to configuration system functionality that specifically supports the configuration entity system, including rearchitecture of configuration synchronization (and related issues), etc. Since he has deep understanding of config entities' requirements, it makes sense for him to be listed as a co-maintainer.
"Configurables" issues with alexpott as a participant:
Add alexpott to maintainers.txt for the configuration entity subsystem.
- +1 from alexpott.
- Sign-off from another config entity subsystem maintainer.